Abstract
The stromatolites of the Belingwe Greenstone Belt (approximately 2700 Ma old) are perhaps the best-developed Archaean stromatolites yet found. Exposures occur on two stratigraphic levels, both part of the “Bulawayan” in Rhodesian stratigraphic terminology (Wilson et al., 1978). The extensive outcrops show a wide variety of stromatolites, including forms similar to Baicalia, Conophyton, Irregularia and Stratifera. Many stromatolites occur in cyclic units, possibly reflecting periodic changes in lagoonal conditions. Associated sedimentary rocks were deposited in a very shallow-water environment and some display well-developed desiccation features. Currently held concepts concerning the evolution of stromatolites and their usefulness in biostratigraphy do not appear to be supported by the evidence from Belingwe.
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